Linux

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Setting Up An NFS Server And Client On Scientific Linux 6.3

Setting Up An NFS Server And Client On Scientific Linux 6.3

This guide explains how to set up an NFS server and an NFS client on Scientific Linux 6.3. NFS stands for Network File System; through NFS, a client can access (read, write) a remote share on an NFS server as if it was on the local hard disk.

Scientific Linux 6.3 Samba Standalone Server With tdbsam Backend

Scientific Linux 6.3 Samba Standalone Server With tdbsam Backend

This tutorial explains the installation of a Samba fileserver on Scientific Linux 6.3 and how to configure it to share files over the SMB protocol as well as how to add users. Samba is configured as a standalone server, not as a domain controller. In the resulting setup, every user has his own home directory accessible via the SMB protocol and all users have a shared directory with read-/write access.

Detailed Error Handling In Bash

Detailed Error Handling In Bash

Shell scripts are often running as background processes, doing useful things without running in a visible shell. To write such scripts can be quite painful, as all errors occur out of sight as well. While log files can hold a lot of information, finding the relevant information is a bit trickier. My solution is to log only the errors with all the details to a small database. This database contains tables for the message, the corresponding stack trace and the important environment variables. I have chosen for an SQLite database in this howto, but the same principle works with other databases as well.

Installing And Using OpenVZ On Scientific Linux 6.3

Installing And Using OpenVZ On Scientific Linux 6.3

In this HowTo I will describe how to prepare a Scientific Linux 6.3 server for OpenVZ. With OpenVZ you can create multiple Virtual Private Servers (VPS) on the same hardware, similar to Xen and the Linux Vserver project. OpenVZ is the open-source branch of Virtuozzo, a commercial virtualization solution used by many providers that offer virtual servers. The OpenVZ kernel patch is licensed under the GPL license, and the user-level tools are under the QPL license.

Setting Up A Standalone Storage Server With GlusterFS And Samba On Debian Squeeze

Setting Up A Standalone Storage Server With GlusterFS And Samba On Debian Squeeze

This tutorial shows how to set up a standalone storage server on Debian 6.0, using GlusterFS and SAMBA, and custom scripts and settings to make life easier.

Configure Monit To Send SMS Instead Of Email

Configure Monit To Send SMS Instead Of Email

This tutorial helps you configure monit  to send alert messages using SMS to your mobile phone when a service fails instead of traditional email notification. Because monit can send only emails but not SMS, we will use an email-to-sms gateway where monit will send its emails to, and the email-to-sms gateway will convert the emails to SMS messages.

Options For User Auditing On Linux Platforms

Options For User Auditing On Linux Platforms

A variety of methods exist for auditing user activity in UNIX and Linux environments. Some of them come preinstalled within common distributions, some can be downloaded as freeware, and some are commercially available products. Here are some of the most popular methods for auditing. Each method is described, along with tips for how to make the best use of each method. In addition, guidance is provided to show what type of auditing each method is best suited for.

A Beginner's Guide To btrfs

A Beginner's Guide To btrfs

This guide shows how to work with the btrfs file system on Linux. It covers creating and mounting btrfs file systems, resizing btrfs file systems online, adding and removing devices, changing RAID levels, creating subvolumes and snapshots, using compression and other things. btrfs is still marked as experimental, but all those features make it a very interesting and flexible file system that should be taken into consideration when you look for the right file system.

How To Clone And Simulate Network Devices On Linux

How To Clone And Simulate Network Devices On Linux

This guide shows how to clone and simulate devices using free and commonly used tools. This could be helpful while conducting network stress-tests, network audits, etc.

Remote MySQL Performance And Query Monitoring

Remote MySQL Performance and Query Monitoring

There may be the situation that you have to monitor a MySQL server remotely. There are some linux tools to do performance and query monitoring locally, and these tools can also used to monitor remotely - but only unencrypted ! Also often MySQL is only listening on the loopback interface, so it is even not reachable remotely over the net (which is very good seen from the security viewpoint). But there is an easy solution in the Linux world.

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